What a san or tanda is and how it differs from a loan
By Equipo Prestafolio
The interest-free rotating fund known as a san, tanda or savings chain depending on the country, its real risks, and why it is not the same as (and does not work like) lending money.
A san (or tanda, or savings chain, depending on the country) is not a loan: it is a group of people lending each other turns, with nobody earning interest. It only resembles a loan at one moment in the cycle, for the first person to receive the pot. For everyone else, it is closer to a savings account than a loan. Confusing the two leads to bad judgement calls, whether you participate in one or compare it to your own lending business.
What it is called by country
The mechanism is the same across the region; what changes is the name:
Country | Common name |
|---|---|
Dominican Republic | San (or Sociedad) |
Mexico | Tanda (central and southern) or cundina (central and northern) |
Colombia | Cadena de ahorro (savings chain) |
Other countries in the region | Local variants of the same concept |
How it works, step by step
Step | What happens |
|---|---|
| A set number of people, usually acquaintances, family or coworkers |
| The same amount, every week, fortnight or month, as the group decides |
| In an agreed order (sometimes by draw) |
| The sum of everyone's contribution for that period goes in full to that turn's person |
| Nobody receives twice until the full cycle completes |
Simple example: 10 people each contribute RD$1,000, every month. Each month, a different person receives RD$10,000. After 10 months, everyone has received their turn exactly once.
Why it only looks like a loan halfway
Here is the key point that answers this article's title:
For whom | How it feels |
|---|---|
The first person to receive their turn | Received RD$10,000 having contributed only RD$1,000: it functions like an interest-free loan from the rest of the group |
The last person to receive their turn | Contributed RD$1,000 for 10 months and received the total at the end: it functions like forced savings, not a loan |
Someone in the middle | A mix of both, depending on how many contributions they made before receiving their turn |
No participant pays interest for receiving their turn early, and no participant earns interest for waiting until the end. That is exactly what sets it apart from a loan: in a loan, whoever lends the money charges something for lending it, and whoever receives it pays it back with that cost included. In a san, everyone puts in and everyone receives the same amount, just at different times.
Differences from a loan, in a table
| San / tanda | Loan |
|---|---|---|
Is there interest? | No, for any participant | Yes, it is the lender's profit |
Who decides who participates? | The group, based on mutual trust | The lender, evaluating each client |
Is there a legal document? | Almost never; it runs on the group's word and trust | There should always be one: a contract and, ideally, a promissory note |
What happens if someone stops contributing? | The group absorbs the loss together, with no formal collection mechanism | The lender can collect, negotiate, refinance or escalate legally |
Is there individual risk assessment? | No, it runs on personal relationship with the group | Yes (or it should): history, ability to pay, collateral |
The real risks of a san or tanda
It is not a risk-free mechanism, and it is worth knowing the risks whether you participate in one or a client of yours relies on one to cover a payment:
Risk | What can happen |
|---|---|
The organiser disappears with the pot | With no legal document and no oversight from any financial authority, there is nobody to formally claim against |
Someone receives their turn and stops contributing | The rest are left without that contribution for the remaining turns, usually with no legal way to collect it |
No formal legal recourse | These are private agreements between individuals, without the protection or enforceable route a well-documented loan has |
The amount and date are rigid | Unlike a loan, you cannot restructure someone's contribution when they hit a one-off hardship without breaking the whole group's balance |
An important note about the name "SAN" inside Prestafolio
If you already use or are about to use Prestafolio, there is something worth clarifying so it does not confuse you: the product has a loan type also called "SAN" in the loan creation form, but it is a completely different thing from what this article describes.
The product's "SAN" is an amortisation system with interest: the principal is split evenly and a constant interest is charged on the original principal each instalment (unlike the traditional fixed instalment, where interest drops as the outstanding balance does). It is, in the product's own words, "the neighbourhood lender's system": easy to calculate in your head and more profitable than the French system at the same nominal rate. It has nothing to do with an interest-free rotating fund among a group of people. See Loan types for the full comparison of the five amortisation systems.
Frequently asked questions
Can a san turn into a problem for my lending business? Indirectly, yes: if a client of yours depends on receiving their turn in a san to pay you an instalment, and that san runs late or falls apart, your client falls behind with you too, with nothing to do with their real ability to pay you. It is worth asking a client whether they depend on a san as a payment source, the same way you would ask about any other unstable income source.
Can I organise a san as part of my business? You can, but be clear it is a different activity from lending money with interest: it does not generate profit for you (unless you also participate as one more member), and it lacks the legal protection of a well-documented loan. If your intention is to make money, a loan with a contract and a promissory note is the right tool, not a san.
Is it legal to organise a san? Yes, it is a private agreement between individuals and is not prohibited in the region's countries; what it lacks is the oversight or the formal legal protection of a regulated financial product.
Summary
- A san/tanda/savings chain is a rotating fund: everyone contributes the same amount, each turn one person receives the total, with no interest for anyone.
- It only resembles a loan for whoever receives their turn first; for whoever receives it last, it is more like a savings account.
- There is no individual risk assessment, no formal legal document, and no collection route if someone stops contributing.
- The "SAN" loan type inside Prestafolio is a different thing: an amortisation system with interest, not a rotating fund.
- If a client depends on a san to pay you, it is a payment source worth understanding before you lend to them.
Prestafolio automatically calculates all five amortisation systems, including the one called "SAN" in the product (even principal plus constant interest), so you can compare which suits you best on the same loan: see Loan types and Simulating a loan.